Water-heater.



' C. A. BOREIN.

WATER HEATER,

APPLICATION FILED mom-1 I Patented Aug. 15, 1911.

WU NESSES:

nooaaea.

CHARLES A. BOREIN, OF OAKLAND, CALIFORNIA.

WATERFHEATER.

specification of Letters Eatent. I Patented Aug, 15, 1911 Application filed December 3, 1909. Serial No. 531,174.

To aZZ whom it may concern:

Be it known that T, CHARLES A. BOREIN, a citizen of the United States, and residing at and whose post-otiice address is 2019 West street, in the city of Oakland, county of Alameda, and State of California, have invented certain new and useful Improvements in /Va.te1--Heate1's; and I do hereby declare the following to be a full, clearyand exact rangement of the parts as hereinafter described.

The objects sought to be accomplished are to combine a gas burner and water heater within the shell of a boiler or reservoir, whereby the water withinv the boiler is caused to circulate through the heater; and to cause the heated water to'rise to the top of the boiler without intermingling with the water of lower temperature contained within the boiler; and to prevent the condensation of the gas'tiame on the boiler surface.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

The drawing represents a side elevation of a combination boiler and heater constructed in accordance with this invention, partly in cross-section to disclose the internal construction and arrangement of the arts.

In detail the construction consists of the boiler shell l,having the bottom 2, and the top 3 fixed therein. The vent tube 4: is centrallyfilxed between the said: top and bottom of the boiler. The bottom 2 is fixed within. the shell of the boiler a suitable distance from the lower edge thereof, to form a hollow chamber 5, to receive the heating ineclianism. The circulation tube 6 inclosing the vent tube 4.-

securcd thereto by the set screws '7, or any other suitable means, leaving the annular space 8 between the two tubes. The circulation tube 6 begins at a point near the bottom of the boiler and terminates, at a point near the top thereof. The bottom 2, the vent tube' l, and the circulation tube 6, are assembled in their proper relations toeach other before being fixed within the shell of the boiler; which is accomplished by riveting, oxyacetylene welding or any other suitable manner. The inlet service pipe 9, passes into the boiler through the spud 10 in the usuttl manner.

The water heater consists of a plurality of superimposed globular chambers having projecting spines on their outer surface to increase the heat absorbing area. This form of heater is preferable because of its eiiiciency, simplicity and cheapness, but it is obvious, that other forms of heaters may be substituted therefor, without departing from the spirit of this invention.

The feed pipe 11 is connected to the bottom of the boiler, and the bottom of the heater 12. The outlet 13 of the heater is screwed intov the T 14, having the lateral nippleslo extending through the walls of the vent tube, and adapted to discharge into the boiler between the vent tube and the circulation tube. The discharge pipe 16 continues from the T lupwardly through the vent tube and is connected to the outlet service pipe 1,7, which is screwed into the spud 18, in the top of the boiler. The pi pc 11 connected to the lowest points of the water containing mechanism is provided with the sediment cock 19.

The heat producing mechanism consists of the Bunsen burner 20, connected to the gas service pipe 21, controlled by the stop cook 22. The flames 1ssuing from the burner are directed against the surface of the heater 12, which absorbs the heat and transmits it to the Water. The products pass upward within the canopy sheath 23, by which they are directed into the vent tube 4, which absorbs the remaining heat transmitting it to the water surrounding the vent tube. It is at this point that the circulation tube 6 performs its function, by confining the heat given off from the vent pipe, directing it upward to the top of the boiler, and preventing a lateral circulation of the heat into the main body of water obtain a few burner utilizing manufactured, or impure thence to pipe 1 which would take place if the circulation tube 6 was omitted. The discharge pipe 16 conducts the hot water directly into the service pipe, accomplishing a quick delivery from the heater into the service. When, however, the water is not being drawn off through pipe 17., the hot water is delivered through the nipples 15 into the circulation tube 6 and will pass over the top of the latter, the colder water leaving through pipe 11 and passing tothe heater. In this manner a circulation is maintained which insures a maximum heating of the water in the shortest period of time. If the burner has been operating for any considerable period the vent tube 4 is heated and imparts its heat-to the surrounding water and when the flow is again started through pipe 17 the heated water will be drawn through nipples 15 into pipe 16 and will pass from In the art of heating water for domestic purposes, immediate results are essential. To this end it is desirable to deliver the hot water to the top of the boiler with as little radiation as possible. It would be manifestly needless to raise the temperature of the whole body of the water merely to gluarts or gallons of very hot 1;

water, when e desired results pan be accomplished by insulating the hotwater discharged from the heating mechanism, from the heat absorbing main body of water with; in the tank, and by increasmg the velocity of the hot water in its naturalrise to the to of'the tank. A'further advantage resu ting 'from the discharge through the lat v eral nipples 15 is the fact that the heated water is permitted to-exp'and and relieve theheater of back pressure, causing more rapid circulation therethrough, with its attendant advantages. The process of combustion in a Bunsen gasgives off Joy-products c'ontaimn corrosive sulfurous, and other acids WlllCh in the condensation of the flame attack the metal parts of the boiler, setting up an electrolytic action between the steelof the boiler and the zinc witnj-which it is coated resulting in thepitting and ultimate perfo-' ration of the boiler walls. By the interposition 'of the canopy sheath which confines theheat to the heater 12, the flames are prevented from striking the coldbot-tom of the boiler and condens ng thereon; in this manner t'hedrip of condensation, or sweating is avoided and the life of the mechanism lengethened. The flame will not condense on; the hot canopy, or theattenua'ted surfaces of the heater 12.v This canopy also 'preventsoverheating "of the walls of the the space between the saidvent tube and said bottom and the topof the boiler, 'a circulationtube inclosing said vent tube and extending from near the bottom to near the top of said boiler, an annular space being formed between. said circulation tube and said vent tube; a heating mechanism connected to the bottom of the boiler, and haw ing a discharge-pipe connected to the top of the boiler, .said dlscharge pipe having dat eral branches leading into the space between the said vent tube and the said circulation tube; and a suitable burner.

2. In a water heater arboiler, a vent tube extending between the bottom and the top of said boiler, a circular tube inclosing said. vent tube, and extending from near the bottom to near the top of the boiler, an annular space being formed between said circular tube and said Vent tube, a heating mechanism connected to the bottom of the boiler and havin a discharge pipe connected to the top 0 the boiler, said discharge pipe having lateral nipples near the bottom of the boiler and leading through the vent tube into said annular space, a burner, and a canopy sheath inclosing said heating mechanism and connected with said vent tube.

3. In a water heater, a boiler, a vent tube extending between the bottom and thetop .of the said boiler; a circulation tube inclosing said vent tube and extending fromnear the bottom-:to near the top of said boiler, an annular space being formed between said circulation tube and said vent tube; a-heating mechanism connected to the bottom of said-boiler and having a discharge pipe proyidedwith lateral branches opening into said circulating tube. V

4:. In a water heater, a boiler,;a vent tube extending between the bottom and the top of said boiler, a circulation tube inclosing I said vent tube and extendingfrom near the bottom to near the top of said'boiler' and a heating mechanism connected to the bottom and to the top of said boiler. a

:5. In a'water heater, a boiler, having. its bottom set above the lower edge of the shell thereof, a vent tube extending between the said bottom and the top of the boiler, a 011- culation tube inclosing said vent tube, a set my hand this 20th day of September, heating mechanism connected with the top 1909. and the bottom of said boiler; a canopy sheath connected with the said vent tube and 5 partially inclosing the said heating mech- WVitnesses:

anism. v BALDWIN VALE,

In testimony whereof,' I have hereunto JAMES C. HAMILTON.

CHARLES A. BOREIN. 

